To use the functions peek and putback in a program, which header file(s) must be included in the program? (4) Suppose that num is an int variable and discard is a char variable. Assume the following...

To use the functions peek and putback in a program, which header

file(s) must be included in the program? (4)

Suppose that num is an int variable and discard is a char variable.

Assume the following input data:

#34

What value (if any) is assigned to num and discard after each of

the following statements executes? (Use the same input for each

statement.) (2, 4)

a. cin.get(discard);

cin >> num;

b. discard = cin.peek();

cin >> num;

c. cin.get(discard);

cin.putback(discard);

cin >> discard;

cin >> num;